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GCSE Mathematics · key term
The quantity used as the basis of a percentage calculation, representing 100%.
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Specification HR10 · Paper 1, Paper 2
Revise: Percentages and Financial MathematicsThe whole reference amount is 100%, half is 50%, and one hundredth is 1%. A percentage describes a proportion, rather than a fixed amount: 50% of £20 is £10, but 50% of £80 is £40.
Identify the reference amount: it is the quantity being treated as 100%. Convert quantities to the same units before comparing them.
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